Horsehead and Flame nebulae around the star "Alnitak" in "Orion's Belt" in the constellation of Orion.
The nebulae are located approximately 1350LY for Flame nebula and 1500LY for the Horsehead curtain glow nebula.
Alnitak is a bit closer at about 1250LY and is the source of light for the glow of the nebulae.
The Horsehead nebula is a cold dark nebula silhouetted against the pink hydrogen alpha emission nebula IC434. The Horsehead shape is just the shape of the nebula that blocks that part hydrogen emission of IC434.
This image was taken using a full spectrum modded Canon 40D.
Image consists of Hbeta, HAlpha and OIII data as well as RGB taken through IR cut and neodymium filters across multiple nights in November and December 2015.